2009 Ivy League Baseball Championship Series

The 2009 Ivy League Baseball Championship Series took place at Red Rolfe Field at Biondi Park in Hanover, New Hampshire on May 2 and 3, 2009. The series matched the regular season champions of each of the league's two divisions. , the winner of the series, claimed the Ivy League's automatic berth in the 2009 NCAA Division I baseball tournament. It was Dartmouth's first Championship Series victory, coming in their fifth appearance.

defeated in a one-game playoff to advance to the Championship Series and represent the Lou Gehrig Division. The playoff was held on April 29 at Hoy Field in Ithaca, New York.